舟形藻在假单胞菌菌膜上的附着及对316L不锈钢腐蚀的影响Attachment of Navicula on Pseudomons Aeruginosa PAO1 Biofilm and Its Corrosion Behavior on 316L Stainless Steel

为了揭示海洋微藻在菌膜上的附着规律及其对金属腐蚀的影响,采用原子力显微镜测试探究舟形藻在铜绿假单胞菌菌膜条件下的附着,并通过电化学阻抗谱和动电位极化曲线方法研究菌膜存在与舟形藻附着对316L不锈钢腐蚀的影响.结果表明,在附着前期菌膜抑制舟形藻的附着,后期则促进舟形藻的附着.电化学测试结果显示,舟形藻的存在增大了316L不锈钢的腐蚀倾向,并使腐蚀速率增大;而菌膜的附着一定程度上抑制了舟形藻对316L不锈钢的腐蚀.

The attachment of microalgae navicula on pseudomons aeruginosa PAO1 biofilm and its influence on the electrochemical behavior of 316L stainless steel were investigated by atomic force microscopy (AFM),electrochemical impedance spectroscopy (EIS) and dynamic potential polarization curve for a better understanding on the attachment of marine microalgae on metal material and its impact on metal corrosion.The results showed that the bacteria biofilm inhibited navicula attachment in the initial stage and promoted navicula attachment in the later stage.Electrochemical results revealed that navicula attachment on 316L stainless steel increased the corrosion tendency of 316L stainless steel,and increased the corrosion rate.However,the bacteria biofilm in some extent inhibited the corrosion of 316L stainless steel.

全文下载：http://pan.baidu.com/s/1qWLx4ba